Juniper JN0-331 : SEC,Specialist(JNCIS-SEC)

JN0-331 real exams

Exam Code: JN0-331

Exam Name: SEC,Specialist(JNCIS-SEC)

Updated: Oct 24, 2026

Q & A: 131 Questions and Answers

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Juniper JN0-331 Exam Syllabus Topics:

SectionObjectives
Security Fundamentals- Network security concepts
  • 1. Threat types and attack vectors
    • 2. Security zones and policies basics
      Security Services and Features- Advanced security features
      • 1. Screening and DoS protection basics
        • 2. Logging and monitoring
          NAT (Network Address Translation)- NAT types and use cases
          • 1. Static NAT
            • 2. Destination NAT
              • 3. Source NAT
                Troubleshooting and Operations- Security troubleshooting
                • 1. VPN connectivity diagnostics
                  • 2. Policy evaluation issues
                    VPN Technologies- VPN implementation
                    • 1. Policy-based vs route-based VPNs
                      • 2. Site-to-site VPN concepts
                        - IPsec VPN
                        • 1. IKE phases and negotiation
                          • 2. VPN troubleshooting basics
                            Security Policies and Firewall Filters- Policy configuration
                            • 1. Match criteria and actions
                              • 2. Policy ordering and evaluation
                                - Firewall filters
                                • 1. Apply filters to interfaces
                                  • 2. Filter terms and rules

                                    Juniper SEC,Specialist(JNCIS-SEC) Sample Questions:

                                    Question #1

                                    Click the Exhibit button.
                                    [edit security policies]
                                    user@host# show
                                    from-zone trust to-zone untrust {
                                    policy AllowHTTP{
                                    match {
                                    source-address HOSTA;
                                    destination-address any;
                                    application junos-ftp;
                                    }
                                    then {
                                    permit;
                                    }}
                                    policy AllowHTTP2{
                                    match {
                                    source-address any;
                                    destination-address HOSTA;
                                    application junos-http;
                                    }
                                    then {
                                    permit;
                                    }}
                                    policy AllowHTTP3{
                                    match {
                                    source-address any;
                                    destination-address any;
                                    application any;
                                    }
                                    then {
                                    permit;
                                    }}}
                                    A flow of HTTP traffic needs to go from HOSTA to HOSTB. Assume that traffic will initiate from
                                    HOSTA and that HOSTA is in zone trust and HOSTB is in zone untrust.
                                    What will happen to the traffic given the configuration in the exhibit?

                                    • A. The traffic will be dropped as no policy match will be found.
                                    • B. The traffic will be permitted by policy AllowHTTP.
                                    • C. The traffic will be permitted by policy AllowHTTP3.
                                    • D. The traffic will be permitted by policy AllowHTTP2.
                                    Reveal Solution  Discussion  0

                                    Correct Answer: C  🗳️

                                    Question #2

                                    Which two statements are true regarding proxy ARP? (Choose two.)

                                    • A. JUNOS security devices can forward ARP requests to a remote device when proxy ARP is enabled.
                                    • B. JUNOS security devices can reply to ARP requests intended for a remote device when proxy ARP is enabled.
                                    • C. Proxy ARP is enabled by default.
                                    • D. Proxy ARP is not enabled by default.
                                    Reveal Solution  Discussion  0

                                    Correct Answer: B,D  🗳️

                                    Question #3

                                    Click the Exhibit button.
                                    [edit schedulers]
                                    user@host# show
                                    scheduler now {
                                    monday all-day;
                                    tuesday exclude;
                                    wednesday {
                                    start-time 07:00:00 stop-time 18:00:00;
                                    }
                                    thursday {
                                    start-time 07:00:00 stop-time 18:00:00;
                                    }}
                                    [edit security policies from-zone Private to-zone External]
                                    user@host# show
                                    policy allowTransit {
                                    match {
                                    source-address PrivateHosts;
                                    destination-address ExtServers;
                                    application ExtApps;
                                    }
                                    then {
                                    permit {
                                    tunnel {
                                    ipsec-vpn myTunnel;
                                    }}}
                                    scheduler-name now;
                                    Based on the configuration shown in the exhibit, what are the actions of the security policy?

                                    • A. The policy will permit transit packets and use the IPsec VPN myTunnel all day Monday and Wednesday 7am to 6pm, and Thursday 7am to 6pm.
                                    • B. The policy will always permit transit packets and use the IPsec VPN myTunnel.
                                    • C. The policy will permit transit packets only on Monday, and use the IPsec VPN Mytunnel.
                                    • D. The policy will always permit transit packets, but will only use the IPsec VPN myTunnel all day Monday and Wednesday 7am to 6pm, and Thursday 7am to 6pm.
                                    Reveal Solution  Discussion  0

                                    Correct Answer: A  🗳️

                                    Question #4

                                    Click the Exhibit button.
                                    [edit chassis]
                                    user@host# show
                                    cluster {
                                    reth-count 3;
                                    redundancy-group 1 {
                                    node 0 priority 1;
                                    node 1 priority 100;
                                    }}
                                    When applying the configuration in the exhibit and initializing a chassis cluster, which
                                    statement is correct?

                                    • A. You must define an additional redundancy group.
                                    • B. You must issue an operational command and reboot the system for the above configuration to take effect.
                                    • C. node 0 will immediately become primary for redundancy group 1.
                                    • D. Three physical interfaces are redundant.
                                    Reveal Solution  Discussion  0

                                    Correct Answer: B  🗳️

                                    Question #5

                                    Click the Exhibit button.
                                    [edit security policies]
                                    user@hostl# show
                                    from-zone Private to-zone External {
                                    policy MyTraffic {
                                    match {
                                    source-address myHosts;
                                    destination-address ExtServers;
                                    application [ junos-ftp junos-bgp ];
                                    }
                                    then {
                                    permit {
                                    tunnel {
                                    ipsec-vpn vpnTunnel;
                                    }}}}}
                                    policy-rematch;
                                    In the configuration shown in the exhibit, you decided to eliminate the junos-ftp application
                                    from the match condition of the policy MyTraffic. What will happen to the existing FTP and BGP sessions?

                                    • A. The existing FTP sessions will continue and only the existing BGP sessions will be dropped.
                                    • B. The existing FTP and BGP sessions will be re-evaluated and all sessions will be dropped.
                                    • C. The existing FTP and BGP sessions will be re-evaluated and only FTP sessions will be dropped.
                                    • D. The existing FTP and BGP sessions will continue.
                                    Reveal Solution  Discussion  0

                                    Correct Answer: C  🗳️

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